摘要
对汽车玻璃升降器中塑料导向轮的蠕变变形进行研究,基于材料的蠕变拉伸试验曲线,采用修正的时间硬化蠕变方程,并考虑绳轮接触影响,建立导向轮的蠕变有限元分析模型。计算获得了导向轮关键位置的应变、位移时间历程曲线及其变化规律,对比试验结果,吻合良好。分析接触情况对蠕变的影响,并与不考虑接触情况下的蠕变过程进行对比研究。结果表明:考虑接触的蠕变分析计算结果精度相对较高,能够反映出导向轮的形变和应力变化过程。
The creep deformation of plastic guide wheel in auto glass lifter is investigated in this paper. Based on the material creep tensile testing curve and the modified time hardening creep equation,the finite element model of guide wheel creep analysis is established considering the contact effect of rope and wheel. Though numerical computation,the time history curves and their variation laws of strain,displacement at the guiding wheel key positions are obtained,and these well agree with the test results. Analysis results both considering the contact effect of creep process and not considering the contact condition of creep process are compared. The results show that the calculation results considering the contact creep analysis has relatively high precision and can reflect the deformation and the stress of the guide wheel change process.
出处
《机械科学与技术》
CSCD
北大核心
2014年第6期924-928,共5页
Mechanical Science and Technology for Aerospace Engineering
基金
中央高校基本科研业务费专项资金(2013-Ⅳ-024)资助
关键词
塑料导向轮
绳轮接触
蠕变变形
汽车玻璃升降器
auto glass lifter
boundary conditions
calculations
constitutive models
creep deformation
creep testing
creep
deformation
experiments
finite element method
mathematical models
MATLAB
plastic guide wheel
rope wheel contact
schematic diagrams
